Home / 7,620.80-10,514.40-4,475.20

Finding the Fourth Proportional to 7,620.80, 10,514.40 and 4,475.20

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Solution

The fourth proportional to 7,620.80, 10,514.40 and 4,475.20 is: 6,174.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.80 : 10,514.40 = 4,475.20 : x
  2. Step 2: Convert to fraction form
    7,620.80/10,514.40 = 4,475.20/x
  3. Step 3: Cross multiply
    7,620.80x = 10,514.40 × 4,475.20
  4. Step 4: Simplify right side
    7,620.80x = 47,054,042.88
  5. Step 5: Solve for x
    x = 47,054,042.88/7,620.80
  6. Step 6: Final answer
    x = 6,174.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.